HD 165054: An Astrometric Calibration Field for High-contrast Imagers in Baade's Window

Meiji M. Nguyen; Robert J. De Rosa; Robert J. De Rosa; Jason J. Wang; Thomas M. Esposito; Paul Kalas; Paul Kalas; James R. Graham; Bruce MacIntosh; Vanessa P. Bailey; Travis Barman; Joanna Bulger; Joanna Bulger; Jeffrey Chilcote; Tara Cotten; Rene Doyon; Gaspard Duchêne; Gaspard Duchêne; Michael P. Fitzgerald; Katherine B. Follette; Benjamin L. Gerard; Benjamin L. Gerard; Stephen J. Goodsell; Alexandra Z. Greenbaum; Pascale Hibon; Justin Hom; Li Wei Hung; Patrick Ingraham; Quinn Konopacky; James E. Larkin; Jérôme Maire; Franck Marchis; Mark S. Marley; Christian Marois; Christian Marois; Stanimir Metchev; Maxwell A. Millar-Blanchaer; Eric L. Nielsen; Rebecca Oppenheimer; David Palmer; Jennifer Patience; Marshall Perrin; Lisa Poyneer; Laurent Pueyo; Abhijith Rajan; Julien Rameau; Julien Rameau; Fredrik T. Rantakyrö; Bin Ren; Jean Baptiste Ruffio; Dmitry Savransky; Adam C. Schneider; Anand Sivaramakrishnan; Inseok Song; Remi Soummer; Melisa Tallis; Sandrine Thomas; J. Kent Wallace; Kimberly Ward-Duong; Sloane Wiktorowicz; Schuyler Wolff

doi:10.3847/1538-3881/ab86aa

HD 165054: An Astrometric Calibration Field for High-contrast Imagers in Baade's Window

Meiji M. Nguyen, Robert J. De Rosa, Robert J. De Rosa, Jason J. Wang, Thomas M. Esposito, Paul Kalas, Paul Kalas, James R. Graham, Bruce MacIntosh, Vanessa P. Bailey, Travis Barman, Joanna Bulger, Joanna Bulger, Jeffrey Chilcote, Tara Cotten, Rene Doyon, Gaspard Duchêne, Gaspard Duchêne, Michael P. Fitzgerald, Katherine B. FolletteBenjamin L. Gerard, Benjamin L. Gerard, Stephen J. Goodsell, Alexandra Z. Greenbaum, Pascale Hibon, Justin Hom, Li Wei Hung, Patrick Ingraham, Quinn Konopacky, James E. Larkin, Jérôme Maire, Franck Marchis, Mark S. Marley, Christian Marois, Christian Marois, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Eric L. Nielsen, Rebecca Oppenheimer, David Palmer, Jennifer Patience, Marshall Perrin, Lisa Poyneer, Laurent Pueyo, Abhijith Rajan, Julien Rameau, Julien Rameau, Fredrik T. Rantakyrö, Bin Ren, Jean Baptiste Ruffio, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Inseok Song, Remi Soummer, Melisa Tallis, Sandrine Thomas, J. Kent Wallace, Kimberly Ward-Duong, Sloane Wiktorowicz, Schuyler Wolff

Earth and Space Exploration, School of (SESE)

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We present a study of the HD 165054 astrometric calibration field that has been periodically observed with the Gemini Planet Imager (GPI). HD 165054 is a bright star within Baade's Window, a region of the galactic plane with relatively low extinction from interstellar dust. HD 165054 was selected as a calibrator target due to the high number density of stars within this region (?3 stars per square arcsecond with H < 22), necessary because of the small field of view of the GPI. Using nine epochs spanning over five years, we have fit a standard five-parameter astrometric model to the astrometry of seven background stars within close proximity to HD 165054 (? < 2?). We achieved a proper motion precision of ?0.3 mas yr-1 and constrained the parallax of each star to be ?1 mas. Our measured proper motions and parallax limits are consistent with the background stars being a part of the galactic bulge. Using these measurements, we find no evidence of any systematic trend of either the plate scale or the north angle offset of GPI between 2014 and 2019. We compared our model describing the motions of the seven background stars to observations of the same field in 2014 and 2018 obtained with Keck/NIRC2, an instrument with excellent astrometric calibration. We find that the predicted position of the background sources is consistent with that measured by NIRC2, within the uncertainties of the calibration of the two instruments. In the future, we will use this field as a standard astrometric calibrator for the upgrade of GPI and potentially for other high-contrast imagers.

Original language	English (US)
Article number	244
Journal	Astronomical Journal
Volume	159
Issue number	6
DOIs	https://doi.org/10.3847/1538-3881/ab86aa
State	Published - Jun 1 2020

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figure set

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Astronomy and Astrophysics
Space and Planetary Science

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Nguyen, M. M., De Rosa, R. J., De Rosa, R. J., Wang, J. J., Esposito, T. M., Kalas, P., Kalas, P., Graham, J. R., MacIntosh, B., Bailey, V. P., Barman, T., Bulger, J., Bulger, J., Chilcote, J., Cotten, T., Doyon, R., Duchêne, G., Duchêne, G., Fitzgerald, M. P., ... Wolff, S. (2020). HD 165054: An Astrometric Calibration Field for High-contrast Imagers in Baade's Window. Astronomical Journal, 159(6), Article 244. https://doi.org/10.3847/1538-3881/ab86aa

Nguyen, MM, De Rosa, RJ, De Rosa, RJ, Wang, JJ, Esposito, TM, Kalas, P, Kalas, P, Graham, JR, MacIntosh, B, Bailey, VP, Barman, T, Bulger, J, Bulger, J, Chilcote, J, Cotten, T, Doyon, R, Duchêne, G, Duchêne, G, Fitzgerald, MP, Follette, KB, Gerard, BL, Gerard, BL, Goodsell, SJ, Greenbaum, AZ, Hibon, P, Hom, J, Hung, LW, Ingraham, P, Konopacky, Q, Larkin, JE, Maire, J, Marchis, F, Marley, MS, Marois, C, Marois, C, Metchev, S, Millar-Blanchaer, MA, Nielsen, EL, Oppenheimer, R, Palmer, D, Patience, J, Perrin, M, Poyneer, L, Pueyo, L, Rajan, A, Rameau, J, Rameau, J, Rantakyrö, FT, Ren, B, Ruffio, JB, Savransky, D, Schneider, AC, Sivaramakrishnan, A, Song, I, Soummer, R, Tallis, M, Thomas, S, Wallace, JK, Ward-Duong, K, Wiktorowicz, S & Wolff, S 2020, 'HD 165054: An Astrometric Calibration Field for High-contrast Imagers in Baade's Window', Astronomical Journal, vol. 159, no. 6, 244. https://doi.org/10.3847/1538-3881/ab86aa

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abstract = "We present a study of the HD 165054 astrometric calibration field that has been periodically observed with the Gemini Planet Imager (GPI). HD 165054 is a bright star within Baade's Window, a region of the galactic plane with relatively low extinction from interstellar dust. HD 165054 was selected as a calibrator target due to the high number density of stars within this region (?3 stars per square arcsecond with H < 22), necessary because of the small field of view of the GPI. Using nine epochs spanning over five years, we have fit a standard five-parameter astrometric model to the astrometry of seven background stars within close proximity to HD 165054 (? < 2?). We achieved a proper motion precision of ?0.3 mas yr-1 and constrained the parallax of each star to be ?1 mas. Our measured proper motions and parallax limits are consistent with the background stars being a part of the galactic bulge. Using these measurements, we find no evidence of any systematic trend of either the plate scale or the north angle offset of GPI between 2014 and 2019. We compared our model describing the motions of the seven background stars to observations of the same field in 2014 and 2018 obtained with Keck/NIRC2, an instrument with excellent astrometric calibration. We find that the predicted position of the background sources is consistent with that measured by NIRC2, within the uncertainties of the calibration of the two instruments. In the future, we will use this field as a standard astrometric calibrator for the upgrade of GPI and potentially for other high-contrast imagers.",

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author = "Nguyen, {Meiji M.} and {De Rosa}, {Robert J.} and {De Rosa}, {Robert J.} and Wang, {Jason J.} and Esposito, {Thomas M.} and Paul Kalas and Paul Kalas and Graham, {James R.} and Bruce MacIntosh and Bailey, {Vanessa P.} and Travis Barman and Joanna Bulger and Joanna Bulger and Jeffrey Chilcote and Tara Cotten and Rene Doyon and Gaspard Duch{\^e}ne and Gaspard Duch{\^e}ne and Fitzgerald, {Michael P.} and Follette, {Katherine B.} and Gerard, {Benjamin L.} and Gerard, {Benjamin L.} and Goodsell, {Stephen J.} and Greenbaum, {Alexandra Z.} and Pascale Hibon and Justin Hom and Hung, {Li Wei} and Patrick Ingraham and Quinn Konopacky and Larkin, {James E.} and J{\'e}r{\^o}me Maire and Franck Marchis and Marley, {Mark S.} and Christian Marois and Christian Marois and Stanimir Metchev and Millar-Blanchaer, {Maxwell A.} and Nielsen, {Eric L.} and Rebecca Oppenheimer and David Palmer and Jennifer Patience and Marshall Perrin and Lisa Poyneer and Laurent Pueyo and Abhijith Rajan and Julien Rameau and Julien Rameau and Rantakyr{\"o}, {Fredrik T.} and Bin Ren and Ruffio, {Jean Baptiste} and Dmitry Savransky and Schneider, {Adam C.} and Anand Sivaramakrishnan and Inseok Song and Remi Soummer and Melisa Tallis and Sandrine Thomas and Wallace, {J. Kent} and Kimberly Ward-Duong and Sloane Wiktorowicz and Schuyler Wolff",

year = "2020",

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doi = "10.3847/1538-3881/ab86aa",

language = "English (US)",

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T2 - An Astrometric Calibration Field for High-contrast Imagers in Baade's Window

AU - Nguyen, Meiji M.

AU - De Rosa, Robert J.

AU - Wang, Jason J.

AU - Esposito, Thomas M.

AU - Kalas, Paul

AU - Graham, James R.

AU - MacIntosh, Bruce

AU - Bailey, Vanessa P.

AU - Barman, Travis

AU - Bulger, Joanna

AU - Chilcote, Jeffrey

AU - Cotten, Tara

AU - Doyon, Rene

AU - Duchêne, Gaspard

AU - Fitzgerald, Michael P.

AU - Follette, Katherine B.

AU - Gerard, Benjamin L.

AU - Goodsell, Stephen J.

AU - Greenbaum, Alexandra Z.

AU - Hibon, Pascale

AU - Hom, Justin

AU - Hung, Li Wei

AU - Ingraham, Patrick

AU - Konopacky, Quinn

AU - Larkin, James E.

AU - Maire, Jérôme

AU - Marchis, Franck

AU - Marley, Mark S.

AU - Marois, Christian

AU - Metchev, Stanimir

AU - Millar-Blanchaer, Maxwell A.

AU - Nielsen, Eric L.

AU - Oppenheimer, Rebecca

AU - Palmer, David

AU - Patience, Jennifer

AU - Perrin, Marshall

AU - Poyneer, Lisa

AU - Pueyo, Laurent

AU - Rajan, Abhijith

AU - Rameau, Julien

AU - Rantakyrö, Fredrik T.

AU - Ren, Bin

AU - Ruffio, Jean Baptiste

AU - Savransky, Dmitry

AU - Schneider, Adam C.

AU - Sivaramakrishnan, Anand

AU - Song, Inseok

AU - Soummer, Remi

AU - Tallis, Melisa

AU - Thomas, Sandrine

AU - Wallace, J. Kent

AU - Ward-Duong, Kimberly

AU - Wiktorowicz, Sloane

AU - Wolff, Schuyler

PY - 2020/6/1

Y1 - 2020/6/1

N2 - We present a study of the HD 165054 astrometric calibration field that has been periodically observed with the Gemini Planet Imager (GPI). HD 165054 is a bright star within Baade's Window, a region of the galactic plane with relatively low extinction from interstellar dust. HD 165054 was selected as a calibrator target due to the high number density of stars within this region (?3 stars per square arcsecond with H < 22), necessary because of the small field of view of the GPI. Using nine epochs spanning over five years, we have fit a standard five-parameter astrometric model to the astrometry of seven background stars within close proximity to HD 165054 (? < 2?). We achieved a proper motion precision of ?0.3 mas yr-1 and constrained the parallax of each star to be ?1 mas. Our measured proper motions and parallax limits are consistent with the background stars being a part of the galactic bulge. Using these measurements, we find no evidence of any systematic trend of either the plate scale or the north angle offset of GPI between 2014 and 2019. We compared our model describing the motions of the seven background stars to observations of the same field in 2014 and 2018 obtained with Keck/NIRC2, an instrument with excellent astrometric calibration. We find that the predicted position of the background sources is consistent with that measured by NIRC2, within the uncertainties of the calibration of the two instruments. In the future, we will use this field as a standard astrometric calibrator for the upgrade of GPI and potentially for other high-contrast imagers.

AB - We present a study of the HD 165054 astrometric calibration field that has been periodically observed with the Gemini Planet Imager (GPI). HD 165054 is a bright star within Baade's Window, a region of the galactic plane with relatively low extinction from interstellar dust. HD 165054 was selected as a calibrator target due to the high number density of stars within this region (?3 stars per square arcsecond with H < 22), necessary because of the small field of view of the GPI. Using nine epochs spanning over five years, we have fit a standard five-parameter astrometric model to the astrometry of seven background stars within close proximity to HD 165054 (? < 2?). We achieved a proper motion precision of ?0.3 mas yr-1 and constrained the parallax of each star to be ?1 mas. Our measured proper motions and parallax limits are consistent with the background stars being a part of the galactic bulge. Using these measurements, we find no evidence of any systematic trend of either the plate scale or the north angle offset of GPI between 2014 and 2019. We compared our model describing the motions of the seven background stars to observations of the same field in 2014 and 2018 obtained with Keck/NIRC2, an instrument with excellent astrometric calibration. We find that the predicted position of the background sources is consistent with that measured by NIRC2, within the uncertainties of the calibration of the two instruments. In the future, we will use this field as a standard astrometric calibrator for the upgrade of GPI and potentially for other high-contrast imagers.

KW - figure set

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ER -

HD 165054: An Astrometric Calibration Field for High-contrast Imagers in Baade's Window

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